MRT 91J101 2013 - 2016 Focus ST EcoBoost T304 Stainless Steel Axle-Back Exhaust with 4" tip Designed for 2013-2016 Ford Focus ST. Give your Focus an attitude adjustment with a deep performance exhaust note! Turns up the volume while increasing the distinct turbo sounds and burbles. All stainless steel exhaust system is built from North American T304 grade material for superior durability. CNC mandrel bent for consistently smooth flow path and precise fit. 4" double wall, polished T304 stainless steel tips with beveled edges add style to your ride. Reduced back pressure boosts fuel economy. Best sounding exhaust on the market! Improved exhaust flow increases horsepower and supports future mods. Hand-crafted in the USA. LIMITED LIFETIME WARRANTY